Most cats hit by a car are alive when you reach them, and the ones that die usually die from 2 things you can influence: blood loss inside the first 60 minutes, and a missed internal injury inside the first 24 hours. The scene plan is 5 minutes of checking, 2 kinds of immobilization, and 3 things you must not do.
Count breathing, look at the gums and press them for capillary refill within 5 minutes. Slide the cat onto a rigid board or wrap it in a 2-layer towel. Be at a clinic within 15 to 20 minutes, and never squeeze the belly, pull a hind leg, or offer food or water on the way.
The first 5 minutes, in 3 numbers
Breathing: a resting cat takes 20 to 30 breaths per minute. Above 40 at rest the chest is compromised, above 60 the cat needs oxygen now. Count 15 seconds and multiply by 4.
Gums: lift the lip. Pink and moist is normal. Pale, white, grey or muddy points to shock or internal bleeding. Press a fingertip on the gum until it blanches, then count until color returns: 1 to 2 seconds is normal, 3 seconds or more is a red flag.
Heart: 180 to 220 beats per minute is the usual adult range. Under 140 or over 240 with pale gums means a catheter and warmed fluids within 30 minutes, not a night of watching at home. Body temperature is the fourth number: below 37.2 C the cat is hypothermic and clots badly, so add 1 blanket, not 10 minutes of thermometer hunting.
3 things you must not do
Do not lift or carry the cat by the belly. A hit-by-car cat often has 1 to 3 of these at once: a torn diaphragm, a ruptured bladder, a lacerated liver. Squeezing the abdomen turns a 2 cm tear into a 5 cm one, and sitting the cat upright costs it 1 whole lung field. Slide one hand under the chest and one under the hips, or use the board.
Do not pull the hind legs, and do not let anyone stretch the cat out. Pelvic fractures turn up in roughly 1 in 4 hit-by-car cats, and the femoral artery runs right over the pelvic rim. A closed fracture pulled straight can become 2 or 3 displaced fragments plus a 200 ml bleed into the thigh.
Do not give food, water or any human painkiller. Water buys nothing and adds aspiration risk before anesthesia in 2 to 4 hours. A single 500 mg acetaminophen tablet is many times the toxic dose for a 4 kg cat, and 1 ibuprofen tablet can injure the same cat's kidneys. There is no safe over-the-counter option at home.
2 ways to immobilize the cat
Rigid board first. A plywood offcut, a plastic cutting board, a car floor mat or an ironing board all work. It should be about 10 cm wider and 20 cm longer than the cat, so a 45 cm cat needs roughly 55 by 65 cm. Three straps at chest, waist and hindquarters hold the cat without pressure on the abdomen; 2.5 cm cloth strips or 2 belts do the job, and 3 straps beat 2 hands.
Towel wrap second, when there is no board. Take a bath towel around 70 by 140 cm, lay the cat on it diagonally, fold 1 corner over each side so 2 layers sit between the cat and your arms, and leave the face open. A soft blanket alone gives no support; a pillowcase cuts airflow and traps heat.
| Hour after impact | Breaths per minute | Heart rate | What to do |
|---|---|---|---|
| 0 to 0.1 (5 min) | 20 to 30 | 180 to 220 | Check gums, CRT under 2 s, slide onto board |
| 0.3 (about 20 min) | 24 to 40 | 160 to 240 | Board flat, 3 straps, 2 people |
| 1 (60 min) | 24 to 40 | 160 to 240 | Triage, oxygen if over 40, 3 films |
| 2 (120 min) | 24 to 44 | 150 to 230 | FAST scan, fluids at 2 to 3 times maintenance |
| 6 (360 min) | 20 to 40 | 140 to 220 | Repeat PCV, watch a 1 to 2 g/dL drop |
| 24 (1440 min) | 20 to 32 | 160 to 220 | Chest film, late bleed window to 72 h |
Hour 0 to 1: the drive
Two people, 1 job each: 1 drives, 1 keeps the board flat and watches the gums. Keep it level on the seat or floor, never on a lap. The radius that matters is 15 to 20 minutes of driving; past 30 minutes, call ahead and ask whether to divert to a 24-hour hospital.
Give the clinic 4 facts in 1 sentence: hit by car, breathing rate, gum color, weight. Those numbers let the team set up oxygen and a warm line before you park. Do not let the cat walk 1 step, even if it stands and looks normal. Adrenaline hides a 2 cm bladder tear for 30 to 60 minutes.
Hour 1 to 6: the injuries you cannot see
Lung contusion is the most common killer. Bruising is often invisible on the film taken at 1 hour, visible at 6 to 12 hours, and worst at 24 to 48 hours. A cat breathing 28 times a minute at intake and 44 at hour 12 is following the typical curve, not improving.
Bladder rupture leaks urine into the abdomen, potassium climbs over 6 to 12 hours, and a potassium above 7 mmol/L is a cardiac emergency. Diaphragmatic hernia shows as 1 quiet lung side plus a loop of gut in the chest. Pelvic fracture shows as a cat that drags 1 leg and cannot rise 6 hours after arrival.
3 tests cover most of it: 2 chest views plus 1 abdominal view, a 5-minute FAST ultrasound, and a panel with packed cell volume, total solids and potassium. Ask for all 3 if the cat went under a wheel.
Hour 6 to 24: the second crash
The dangerous window is not the first hour, it is 6 to 72 hours. A 2 g/dL drop in packed cell volume between 2 films means bleeding is ongoing, and air in the chest can worsen when a rib shifts. Go back for any of 5 signs: breathing above 40 at rest, white gums, no urine for 12 hours, inability to stand 6 hours after arrival, or a belly that grows 2 cm in 6 hours.
Budget: exam 200 to 600 CNY, 150 to 400 per radiograph, 2000 to 8000 for surgery, 500 to 1500 per hospital night.
Do these 5 things now
- Run the 5-minute check and write 3 numbers into your phone: breaths, gum color, CRT.
- Choose the board over your arms, and use 3 straps so nobody presses the belly.
- Cover the cat against heat loss but keep the face and chest clear.
- Call the clinic with 4 facts and confirm they have oxygen and radiography tonight.
- Photograph the road and the car, then ask for a written plan with 24 and 72 hour rechecks.
If the cat is unconscious, breathing under 10 times a minute, or has white gums, skip the roadside plan and drive. If it is stable and walking, still go: a normal-looking cat at hour 1 is the classic picture of a diaphragm tear found at hour 30. Never leave the cat in a parked car while you queue, and read car heatstroke if the accident happened in summer traffic. For anything it chewed at the roadside, check toxic houseplants emergency and the toxicity checker.
Terms mentioned in this article
Frequently asked
Can I move a cat hit by a car without a board?
Yes, but only with two hands placed under the chest and under the hips, keeping the spine level. A rigid board is still better because it needs no abdominal pressure and lets you strap the cat in 3 places for the drive, which matters when a pelvic fracture or a torn diaphragm is possible.
How long can I watch a cat that seems fine after an accident?
Do not watch at all on day one. Lung bruising often appears between 6 and 12 hours and peaks at 24 to 48 hours, and a 2 cm bladder tear can stay hidden for 30 to 60 minutes behind adrenaline. Go to a clinic, get 3 radiographs and a FAST scan, and keep the 24 and 72 hour rechecks.
Is it safe to give a human painkiller for the pain?
No. One 500 mg acetaminophen tablet is many times the toxic dose for a 4 kg cat and causes methemoglobinemia, and a single ibuprofen tablet can damage the kidneys. Give no food, no water and no drugs on the drive, and let the clinic choose an injectable pain plan.